[lldb-dev] Python API: Evaluating commands with specified language

Michail Pishchagin mblsha at gmail.com
Thu Dec 25 23:33:55 PST 2014

Thanks, it works!

And I'm trying to get language based on current frame — it seems that SBCompileUnit.GetLanguage() was added very recently in r222189. Will it be added to the Xcode 6 updates?

P.S. Python API reference (http://lldb.llvm.org/python_reference/) is badly outdated — it says that it was generated back in 2013, and it looks that I have to rely on SB* headers in lldb repository to get up-to-date info.

> On 26 дек. 2014 г., at 1:28, Jason Molenda <jason at molenda.com> wrote:
> Hi Michail, 
> Try the SBFrame::EvaluteExpression(const char *expr, const SBExpressionOptions &options) method where you've specified the language in the SBExpressionOptions object.
> J
>> On Dec 24, 2014, at 12:11 AM, Michail Pishchagin <mblsha at gmail.com> wrote:
>> Hi!
>> I've been trying to get https://github.com/facebook/chisel to work on Swift targets, and so far noticed one issue: while I'm stopped inside Swift code, all SBFrame.EvaluateExpression() calls are evaluated as if they're in Swift, not in Objective-C (this is what Chisel expects).
>> It's very easy to reproduce the issue using just default prompt:
>> (lldb) e (id)objc_getClass("NSClipView")
>> error: <EXPR>:1:5: error: consecutive statements on a line must be separated by ';'
>> (id)objc_getClass("NSClipView")
>>   ^
>>   ;
>> (lldb) script
>> Python Interactive Interpreter. To exit, type 'quit()', 'exit()'.
>>>>> value = lldb.frame.EvaluateExpression('(id)objc_getClass("NSClipView")')
>>>>> str(value.GetError())
>> 'error: <EXPR>:1:5: error: consecutive statements on a line must be separated by \';\'\n(id)objc_getClass("NSClipView")\n    ^\n    ;'
>> (lldb) e -l objective-c++ -- (id)objc_getClass("NSClipView")
>> (id) $1 = 0x00007fff7c259440
>> I've looked at LLDB Python API (http://lldb.llvm.org/python_reference/), and was unable to find a way to explicitly specify a language using EvaluateExpression call. Is there a way to do so?
>> -Michail
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